There are more and more foreigners in China, and many people have some foreign friends of their own. For these foreign friends, the first thing is to keep in touch and maintain good feelings with each other. Since you are going back, it is good to give them a small gift. Here are some suggestions for you:
1. Give some gifts with Chinese characteristics, such as paper fans and red Chinese knots. They will like them very much. Foreigners are always curious about and like Chinese culture and characteristics.
2. Give him a friend gift, a simple gift is fine. Put it in his home and he will often think of you as a friend. You can give him a real doll, make it together with you, and let him put it at home. It will be very interesting.
3. You can give him a book or a greeting card as a souvenir. Write your message to him on the book, and he will like the Chinese poems and books with great charm.
This is my suggestion, I hope you will adopt it.